【摘要】 本文对我国煤炭围岩分类现状及存在的问题进行了分析,认为修改现行煤炭围岩分类已势在必行。并对修改煤炭围岩分类提出了建议。更多还原

【Abstract】 An analysis is made of the classification of coal countryrock in our country with regard to its current trends and existing problems. In view of the necessity for improvements, amendments are prpoposd accordingly.更多还原